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nir: Add lowering of nir_op_unpack_half_2x16.

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Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
This commit is contained in:
Matt Turner
2016-01-21 15:46:47 -08:00
parent e4278a847e
commit 9ce901058f
2 changed files with 29 additions and 4 deletions
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3
src/compiler/nir/nir.h
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@@ -1468,6 +1468,9 @@ typedef struct nir_shader_compiler_options {
/** lowers ffract to fsub+ffloor: */
bool lower_ffract;
bool lower_pack_half_2x16;
bool lower_unpack_half_2x16;
/**
* Does the driver support real 32-bit integers? (Otherwise, integers
* are simulated by floats.)

30
src/compiler/nir/nir_lower_alu_to_scalar.c
View File

@@ -97,6 +97,20 @@ lower_alu_instr_scalar(nir_alu_instr *instr, nir_builder *b)
*/
return;
case nir_op_pack_half_2x16:
if (!b->shader->options->lower_pack_half_2x16)
return;
nir_ssa_def *val =
nir_pack_half_2x16_split(b, nir_channel(b, instr->src[0].src.ssa,
instr->src[0].swizzle[0]),
nir_channel(b, instr->src[0].src.ssa,
instr->src[0].swizzle[1]));
nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
nir_instr_remove(&instr->instr);
return;
case nir_op_unpack_unorm_4x8:
case nir_op_unpack_snorm_4x8:
case nir_op_unpack_unorm_2x16:
@@ -106,11 +120,19 @@ lower_alu_instr_scalar(nir_alu_instr *instr, nir_builder *b)
*/
return;
case nir_op_unpack_half_2x16:
/* We could split this into unpack_half_2x16_split_[xy], but should
* we?
*/
case nir_op_unpack_half_2x16: {
if (!b->shader->options->lower_unpack_half_2x16)
return;
nir_ssa_def *comps[2];
comps[0] = nir_unpack_half_2x16_split_x(b, instr->src[0].src.ssa);
comps[1] = nir_unpack_half_2x16_split_y(b, instr->src[0].src.ssa);
nir_ssa_def *vec = nir_vec(b, comps, 2);
nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(vec));
nir_instr_remove(&instr->instr);
return;
}
case nir_op_fdph: {
nir_ssa_def *sum[4];